Call out for assistance. Doing a dig and need a pic. Was watching a video yesterday where a map was left up for quite a time. I noted details and figured I could easily find the map, but unfortunately I've spent quite a bit of time unsuccessfully.

The map I want is of the United States and it is a map of tunnels underground. The guy the video referenced was David Paladies (I am guessing he was the map source).

Any assistance is greatly appreciated. Happy St. Patrick's Day and Happy Sunday.